package com.henry.framework.helper;

import com.henry.framework.util.ReflectionUtil;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

/**
 * Created by 峥桂 on 2017/5/6.
 */
public final class BeanHelper {

    /**
     * 定义Bean映射（用于存放Bean类与Bean实例的映射关系）
     */
    private static  final Map<Class<?>,Object> BEAN_MAP= new HashMap<Class<?>, Object>();
    static {
        Set<Class<?>> beanClassSet=ClassHelper.getBeanClassSet();
        for (Class<?> beanClass:beanClassSet) {
            Object obj= ReflectionUtil.newInstance(beanClass);
            BEAN_MAP.put(beanClass,obj);
        }
    }

    /**
     * 获取bean映射
     * @return
     */
    public static Map<Class<?>, Object> getBeanMap() {
        return BEAN_MAP;
    }

    /**
     * 获取bean实例
     * @param cls
     * @param <T>
     * @return
     */
    public static <T> T getBean(Class<T> cls){
        if(!BEAN_MAP.containsKey(cls)){
            throw  new RuntimeException("can not get bean by class："+cls);
        }
        return (T)BEAN_MAP.get(cls);
    }
}
